Analysis of switching DC-DC converters using a grid-point approach

Abstract

-A switching dc-dc hverter in closed-loop steady-state constitutes an operating point in the space of parameters describing its model. The inadequacy of conventional design of regulated converters, which is based on the assumption of smallsignal perturbations about a single operating point, is addressed. A systematic and general modelling based on a grid-point approach is thus proposed. Under this modelling approach, multiple operating points within the parameter space are reduced to some defined grid-points describing the complete operation space of a regulated converter subjected to large-signal disturbances. The operation subspace of a given grid-point is analyzed. An example based on a PWM-type h t converter is to be given.

Stability analysis of systems with parameter uncertainties under fuzzy logic control

“…However, when the variation of parameters is large, these techniques will eventually fail. To alleviate this problem, a multiple grid-point method was proposed by h u n g [4]. This method uses more than one operating point (i.e.…”